This module provides an application model to be run at a User Equipment (UE), which generates periodic requests to be sent to a MecResponseApp module hosted on an (edge) host, located next to a base station. For each request, it expects to receive a response from the MecResponseApp. This module records statistics about the Round-trip Time (RTT). Optionally, the effect of migration can be simulated when the User Equipment (UE) performs a handover to a different base station. In this case, the application can be configured to forward new requests to a different (edge) host, namely, the one located next to the new base station.

Inheritance diagram

The following diagram shows inheritance relationships for this type. Unresolved types are missing from the diagram.

Parameters

Name	Type	Default value	Description
phyModule	string	"^.cellularNic.nrPhy"
localPort	int	4000
destPort	int	4000
destAddress	string
packetSize	int	intuniform(8000B,12000B)
tos	int	-1	if not -1, set the Type Of Service (IPv4) / Traffic Class (IPv6) field of sent packets to this value
period	double	1s
startTime	double	0s
stopTime	double	200s
appId	int	1
enableMigration	bool	false

Properties

Name	Value	Description
display	i=block/source

Gates

Name	Direction	Size	Description
socketOut	output
socketIn	input

Signals

Name	Type	Unit	Description
recvResponseSno
requestRTT
requestSize

Statistics

Name	Title	Source	Record	Unit	Interpolation Mode	Description
recvResponseSno	Received Sequence number	recvResponseSno	vector
requestRTT	Round trip time	requestRTT	stats, vector
requestSize	Request packet size	requestSize	stats, vector

Source code

//
// This module provides an application model to be run at a User Equipment (UE), which
// generates periodic requests to be sent to a ~MecResponseApp module hosted on an (edge)
// host, located next to a base station. For each request, it expects to receive a
// response from the ~MecResponseApp. This module records statistics about the Round-trip Time (RTT).
// Optionally, the effect of migration can be simulated when the User Equipment (UE)
// performs a handover to a different base station. In this case, the application can be
// configured to forward new requests to a different (edge) host, namely, the one located next to
// the new base station.
//
simple MecRequestApp like IApp
{
    parameters:
        @display("i=block/source");

        string phyModule = default("^.cellularNic.nrPhy");
        int localPort = default(4000);
        int destPort = default(4000);
        string destAddress;
        volatile int packetSize @unit(B) = intuniform(8000B,12000B);
        int tos = default(-1); // if not -1, set the Type Of Service (IPv4) / Traffic Class (IPv6) field of sent packets to this value

        double period @unit("s") = default(1s);
        double startTime @unit("s") = default(0s);
        double stopTime @unit("s") = default(200s);

        int appId = default(1);
        bool enableMigration = default(false);

        @signal[requestSize];
        @statistic[requestSize](title="Request packet size"; unit=""; source="requestSize"; record=stats,vector);
        @signal[requestRTT];
        @statistic[requestRTT](title="Round trip time"; unit=""; source="requestRTT"; record=stats,vector);
        @signal[recvResponseSno];
        @statistic[recvResponseSno](title="Received Sequence number"; unit=""; source="recvResponseSno"; record=vector);
    gates:
        output socketOut;
        input socketIn;
}

File: src/apps/mecRequestResponseApp/MecRequestApp.ned

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